Advantages: more reasonable air circulation, more uniform indoor temperature, high comfort, easy to use, low power consumption, low cost and long service life.
Disadvantages: central air conditioning price investment is much higher than ordinary air conditioning, central air conditioning installation is more complex.
Choosing points: central air conditioning is "one drag N", that is, an outdoor machine with multiple indoor machines, different indoor machines, the specific number of horsepower is also different, in general, the cooling capacity required for each 1_space is 180 ~ 220W, in the purchase of the main total horsepower is large enough to drag more indoor machines, according to the different areas of the match. Matching according to different areas.
What is an electric fan: it is an electrical appliance that uses an electric motor to drive the fan blades to rotate to achieve the accelerated circulation of air.
Advantages: the price is right, the air volume is large, and there are desktop, hanging, floor-standing, wall-mounted and other models to choose from
Disadvantages: the cooling effect is not very obvious, especially when the temperature is high, and seasonal, can only be used in the summer.
Selection points: in the selection of electric fans must listen to the motor running noise, to see if it is running in the jitter, whether smooth; good motor so that you are in a quiet environment, only to hear the wind "whispering", ultra-quiet wind is a good fan.
What is an air-conditioner: composed of cooling coils and axial fans, through the forced action of the axial fan, the air will be cooled room air through the cooling fan cooling exhaust group, forced convection heat transfer, so that the air is cooled, so as to achieve the purpose of lowering the temperature of the room (or library).
Advantages: no Freon, set in addition to odor, ventilation, cooling, temperature, humidity in one.
Disadvantages: large area cooling effect is not very good, no dehumidification function, high temperature is not good.
Selection points: in the purchase of products, you can look at the combination of air-conditioning unit of the various joints are connected tightly, the use of screws, buttons, and other small parts of the production of whether the production is delicate, whether the installation is tight, whether the contact is good, and so on.
What is a neck fan: it is literally a fan hanging on the neck. Mainly in order to meet the new demand for people to go out and portable, wireless blowing use of a new sub-category of electric fans.
Advantages: easy to carry, free hands, lazy people exclusive; rechargeable long life, wireless use.
Disadvantages: Compared to the product itself, its price premium is too high.
Choosing points: the bladeless design of the neck fan is quieter and healthier, and does not suck hair and does not curl hair.
What is the rapid cooling agent: the main ingredient of the cooling agent is difluoroethane, with a light fragrance, sprayed with heat will be quickly vaporized, thus absorbing the heat on the surface of the ornamental items, to achieve the effect of rapid cooling.
Advantages: green materials, non-toxic, non-corrosive, non-polluting, easy to carry, simple to use.
Disadvantages: cooling spray flammable and explosive components hide fire hazards.
What is a refrigeration cup: the use of embedded high-tech semiconductor refrigeration chip refrigeration, simple shape, small size, easy to carry can be given to Coke, beer, tea refrigeration tea cup.
Features: refrigeration fast, less power consumption, homemade all kinds of cold drinks, convenient and easy to use.
Ice cushion is what: Ice cushion is generally filled with ice crystals chemical compound, the principle of work is to absorb heat after the ice crystals will gradually melt, after using a few minutes of cooling will be restored to the state of the ice crystals compound before use.
Pros: simple design, easy to use, affordable.
Disadvantages: sitting on the ice cushion easy to let the buttocks cold, not recommended for long time use.
Selection points: If you need to use the ice cushion, you should go to the regular production producers to buy, do not be greedy cheap figure style. Purchase first smell whether there is a pungent odor. Before using warm water to clean and wipe, dry for a period of time to evaporate the formaldehyde.